package md5;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.math.BigInteger;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.security.MessageDigest;

public class MD5Filter {
    public static String getMd5ByFile(File file) {
        String value = null;
        FileInputStream in = null;
    try {
        in = new FileInputStream(file);
        MappedByteBuffer byteBuffer = in.getChannel().map(FileChannel.MapMode.READ_ONLY, 0, file.length());
        MessageDigest md5 = MessageDigest.getInstance("MD5");
        md5.update(byteBuffer);
        BigInteger bi = new BigInteger(1, md5.digest());
        value = bi.toString(16);
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
            if(null != in) {
                try {
                in.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    return value;
    }
 
    public static void main(String[] args) {
         String a = MD5Filter.getMd5ByFile(new File("D:\\new\\libcheryIIcust.dll"));
         String d = MD5Filter.getMd5ByFile(new File("d:\\libcheryIIcust.dll"));
         System.out.println(a );
         System.out.println(d);
         if(a.equals(d)){
        	 System.out.println("true");
         }
//         
//         File f = new File("\\\\10.1.7.197/tc10install/tcdata10win/am");
//         String []ff = f.list();
//         for(String x:ff){
//        	 System.out.println(x);
//         }
    }
}